Sourced from Berkeley County Chapter 59 Land Development and Subdivision Regulations, Berkeley County Water and Sanitation, R.61-56, and Post and Courier reporting of March 12, 2024 — last checked August 2026.
Who Issues Berkeley County Septic Permits
This is the part that surprises people moving to South Carolina from almost anywhere else: Berkeley County does not issue septic permits, and neither does any other South Carolina county. Onsite wastewater permitting is a state function.
The agency is the South Carolina Department of Environmental Services (SCDES), created on July 1, 2024 when Act 60 of 2023 split the old DHEC into SCDES for environmental programs and SC DPH for public health. Septic sits in SCDES’s Bureau of Regional and Laboratory Services.
Where the application goes: ATTN: OSWW, SCDES, 2600 Bull Street, Columbia, SC 29201
Statewide phone: 1-855-731-2504 (Onsite Wastewater Customer Service Center)
Online: epermitting.des.sc.gov
Form: D-1740, revision 07/2026
The Fee Is the Same in Every County: $150
Because permitting is centralized, there is one fee statewide. R.61-56 § 102.2: the Department “shall charge a fee of one hundred and fifty dollars ($150.00) to evaluate the site of a proposed onsite wastewater system.” That section was amended effective May 27, 2022. Payment is by check or money order to SCDES, and there is a $150 re-application fee if the application instructions are not followed.
There is a second route worth knowing about. You may hire a Professional Soil Classifier to do the evaluation privately, and the rules cap what they may charge at “no more than three (3) times SCDES’s fee” — so up to $450 (form DES 25-0011, dated 07/2025). People use it to skip the queue, and the queue is real: SCDES reported a 700-permit backlog in April 2023, and coastal counties have run six to fourteen weeks behind.
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Shared Septic Systems Are Prohibited
From Berkeley County Chapter 59, Land Development and Subdivision Regulations: “Community/Shared Individual Onsite Wastewater (Septic) Facilities … are prohibited” in unincorporated Berkeley County.
State authorization for an individual system is required for each new lot before plat approval — not after, not at building permit stage. So in Berkeley the septic question is settled at the platting table.
The Surety Bond Is the Unusual Part
On top of the prohibition, the county requires:
- Perpetual maintenance assurances
- A septic affidavit and release
- A minimum two-year installer warranty
- Inspection reports
- A surety bond held by Berkeley County covering the first five years of operation, and accounting for annual inflation
We have not found another South Carolina county that holds a bond against the performance of a residential septic system. It is a real cost and a real administrative step, and it is the sort of thing a developer discovers late. If you are subdividing land in unincorporated Berkeley County, price the bond in at the start.
There is also a certificate-of-occupancy gate. Sec. 11-61 states, in capitals, that a certificate of occupancy will not be issued until the permitting department receives the water and sewer tap receipts or final approval for septic. No sign-off, no occupancy.
Why Berkeley Takes This Seriously: Bridges at Seven Lakes
Berkeley County has a documented, named example of what the six-inch rule permits. The Bridges at Seven Lakes subdivision experienced septic failures attributed to “high groundwater and hard clay” — soil unsuitable for the systems that were approved on it.
That is the practical argument for the county’s belt-and-braces approach, and it is also the reason to read a soil report on a Berkeley lot with genuine care rather than as a formality. Clay that holds water and a water table six inches down are a combination the state rule allows and physics does not forgive.
The Rule That Costs the Most Money: Six Inches
South Carolina requires a minimum vertical separation of six inches between the deepest point of effluent application and the zone of saturation — the level groundwater reaches — for systems under 1,500 gallons per day (R.61-56 § 200.3).
Six inches is remarkably little, and the comparison is the fastest way to understand it:
- South Carolina — 6 inches
- North Carolina — 18 inches on the coast, 12 inches inland
- Georgia — 24 inches
- Alabama — 24 inches
South Carolina permits systems on ground its neighbors would refuse. That is legal, and it is also why Berkeley has already produced a documented failure attributable to exactly this — see below.
The Repair Area Nobody Tells You About
Under R.61-56 § 200.7, a new system must reserve “a usable repair or replacement area equivalent to at least fifty (50) percent of the size of the original system” — 100 percent for community systems.
Read that as a land requirement, because that is what it is. Your lot has to hold the tank, the drainfield, and half a drainfield again in reserve, while still meeting every setback. On a tight lot that reserve area is what fails, not the drainfield itself. Because Berkeley bans shared systems, there is no option to pool a replacement field with a neighbor. Your reserve area has to be on your own lot.
Setbacks and Sizing in Berkeley County
These come from R.61-56 and apply identically statewide:
- 75 feet from a private well · 100 feet from a public well
- 75 feet from the mean high water line of a stream, canal or retention pond, and from a delineated critical area line (tidal waters and tidelands)
- 25 feet from a drainage ditch · 25 feet upslope of a basement
- 5 feet from a property line · 5 feet from a building
- Rock or a restrictive horizon must sit more than 12 inches below the deepest point of effluent application
There is no state minimum lot size for a septic lot. R.61-56 requires only that the lot be large enough to hold the system, the reserve area and the setbacks. Berkeley’s controls run through its subdivision approval process rather than a published acreage floor. We could not read Sec. 65-74, “Required connection” — the county does have a mandatory sewer connection provision, and its distance threshold is unverified. That is a specific, consequential number we do not have. Ask the county for it.
When Sewer Blocks a Septic Permit
R.61-56 § 300 is blunt: “Permits for new onsite wastewater systems shall not be issued where a wastewater treatment facility is accessible for connection,” and the same bar applies to repairing or replacing a failing system.
But the state sets no distance. “Accessible” is defined only negatively — “where annexation or easements to cross adjacent property are required to connect… the wastewater treatment facility shall not be considered accessible.” So if connecting would require you to be annexed, or to cross a neighbor’s land, sewer is not accessible and your septic permit stands.
Berkeley County Water and Sanitation is the main provider — 212 Oakley Plantation Drive, Moncks Corner, SC 29461, (843) 761-8817, open 9am to 5pm Monday to Friday, with 246 employees. Parts of the county are also served by Moncks Corner CPW, Charleston Water System, Mount Pleasant Waterworks and Summerville CPW. BCWS is upgrading the Central Berkeley effluent system with four new 125-horsepower vertical turbine pumps and roughly 17,500 linear feet of parallel force main discharging to the Cooper River, financed through the Clean Water revolving fund — though no cost or completion date is published.
What We Could Not Confirm
The Sec. 65-74 mandatory connection distance. Berkeley County has a required-connection provision and we could not read it. This is the single most useful number missing from this page.
The revision date of Chapter 59’s septic provisions. The county page publishing them shows no date, so we cannot tell you how current they are.
The surety bond amount. It is formula-based and inflation-adjusted; no figure is published. And note Sec. 11-61 still says “DHEC” — the code has not caught up with the 2024 agency change.
Where Berkeley County Sits
Berkeley stretches from the Charleston suburbs at Goose Creek and Hanahan up through Moncks Corner into rural land along Lake Moultrie, and it is absorbing metro growth fast. Its response to that growth has been to make individual septic the only onsite option and to stand behind it with warranties and a bond — a materially different posture from its neighbors.
Nearby counties we cover: Charleston County · Dorchester County. All of them run through the same state permit and the same $150 fee — what differs is the local ordinance layer, which is compared on our South Carolina septic permits by county page.
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